1. Center for Free-Electron Laser Science (CFEL), Deutsches Elektronen-Synchrotron DESY, 22607 Hamburg, Germany
2. Department of Physical Chemistry, Indian Association for the Cultivation of Science, Kolkata, India
3. Department of Chemistry, Malaviya National Institute of Technology Jaipur, J. L. N. Marg, Jaipur, India
4. Department of Chemistry, Asutosh College, Kolkata, India